r)7S KA^ill.Y XXir. ("KVI'TOlMrAOlD.i:. 



Sulilamily ATOMARIINAE. 

 'I'hc tii('iiil)('fs (il llii- siiliC-iinilx ;irc iihisI fcndil)- di-il iiiti'uislicd 

 l)\- llu" position of I lie ;iiilciiii;i'. these ori^jiiis Ifiiiu inserted iiixiii 

 ill,. IVoiil ;iii(| liaviiiu' their l)iises -lose lo.ucther. The hody is 

 sinallei', as a nde. than in the ri-ylophaii'iiia'. The foUowing genera 

 ai-e known to be represented or ]M'()hahly oeeiii' in the State: 



KEY TO ]M)I.\.\A (a:XKHA Ol'" ATOMAKUN.K. 



(/. I'rosleriKil si)ine ri-('(>. Ilie tip passing evor the ed.ae of (lie flat or feebly 

 roiicave surface of (lie in(>s()s(eniinn : auteuiitTe freiN the grooves he- 

 fore (he eyes wlmjly dhsnlcU'. cluh jeusely three-jointiMl ; scntellnni of 

 iii()(1era(e size. 

 I). Si»ine of prnsteniuin pr<ileii.ue<l and acu(e at (iji: side margin of (hn- 

 rax (hadde; hind (arsi of male 4-.iointed : form elongate, pnheseent. 



XI. C.EXOSCF,I-lS. 



/(/;. Spine of prosternum shorter and truncate at tip; thorax with a sin- 

 gle lateral edge; hind tarsi O-jointed in both sexes; form variable. 

 c. Elytra not margined at base ; body always distinctly pubescent. 

 (1. Body elongate and parallel ; thorax ungulate and foveate close 

 to the edge far behind the middle; antenujc very close at base, 

 the basal .joint olteonical. AoATHENfiis. 



<l(l. r.ody oval, moi-e convex; thorax rounded or angulate at or be- 

 foi-e the ndddle; antenna^ less close at base, the basal joint 

 shorter and oblong. XII. Atomakia. 



<■(■. i:iylra witli a l)e,ided m.argin at liase; body minute and nearly 

 glabrous. XIII. Tisactia. 



(III. Trosternal spine broader .ind ll.atter, the tip broadly curved and re- 

 ceived closely within a depression at the apex of mesosternum ; scu- 

 tellum cordate, very nunute; body broadly oval, convex and almost 

 glabrous. XIV. Ephistemus. 



Xr. ('.KXOSCKIJS Thoni. ISTO. MJr.. "eoninion ' ti])ia.") 



Rather eloiioat(\ strongly i)nnctnred and pubescent l)eetb>s. [xis- 

 sessing the eliaracters mentioned in key ;ind liaving the thorax 

 broadly impressed at base; antenna' stont, with the ba.sa.l joint nii- 

 nsnally large and obeonie. Three species have been taken in Indi- 

 ana, while one other may occnr. 



KKV TO INDIANA SPKCOOS (}[' C.ENOSCEI.IS. 



(/. Color ]iale reddish-brown. 



/(. 'I'liorax one-third wider than U<wj:. strongly cui-ved a( sides, basal im- 

 pi-('ssion median and feeble; liody nari-o\v and radiei- elongale. 



1 KM. FKKHlCrNKA. 



hh. 'I'hur.-ix Iwn Ihii-ils widei- tliau long; liody s(ontef and more oval in 



r,,nil. TKSTACKA. 



iKi. Color piceiMis lii'nw II to black; thorax liro.-idly impressed at b.nse. 



